Let's divide 4951 by 81
The aim is to understand the frequency of 81 in 4951.

On to step 1:
If we divide 4 by 81, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 81

Moving on to step 2:
The number 81 fits into 49 0 times, leaving a remainder of 49.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 49 and we're left with 49.
Bring next digit (5) of the dividend behind the 49 and repeat the process: 495 / 81

Step 3:
When dividing 495 by 81, we get 6 with a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 6.0
Deduct 486 from 495 and we're left with 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 81

Advancing to step 4:
81 goes into 91 1 times with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 61.0
If we subtract 81 from 91, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 5:
100 divided by 81 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 61.1
The remainder is 19 after subtracting 81 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 6:
When dividing 190 by 81, we get 2 with a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 61.12
Subtracting 162 from 190 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 7:
81 can be fit into 280 3 times, resulting in a remainder of 37.
Put 3 as the next digit of the answer. 
Result so far: 61.123
The remainder is 37 after subtracting 243 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 8:
81 can be fit into 370 4 times, resulting in a remainder of 46.
The number 4 becomes the next digit in our result. 
Result so far: 61.1234
Subtracting 324 from 370 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 9:
81 can be fit into 460 5 times, resulting in a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 61.12345
Subtract 405 from 460 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Moving on to step 10:
The number 81 fits into 550 6 times, leaving a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 61.123456
Subtract 486 from 550 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 11:
81 can be fit into 640 7 times, resulting in a remainder of 73.
Write down 7 as next digit of the result. 
Result so far: 61.1234567
Deduct 567 from 640 and we're left with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 12:
81 goes into 730 9 times with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 61.12345679
If we subtract 729 from 730, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 61.12345679, with a leftover of 1e-09.